diff options
Diffstat (limited to 'kernel/debug')
| -rw-r--r-- | kernel/debug/kdb/kdb_bt.c | 61 |
1 files changed, 34 insertions, 27 deletions
diff --git a/kernel/debug/kdb/kdb_bt.c b/kernel/debug/kdb/kdb_bt.c index 120fc686c919..d9af139f9a31 100644 --- a/kernel/debug/kdb/kdb_bt.c +++ b/kernel/debug/kdb/kdb_bt.c @@ -101,6 +101,27 @@ kdb_bt1(struct task_struct *p, unsigned long mask, bool btaprompt) return 0; } +static void +kdb_bt_cpu(unsigned long cpu) +{ + struct task_struct *kdb_tsk; + + if (cpu >= num_possible_cpus() || !cpu_online(cpu)) { + kdb_printf("WARNING: no process for cpu %ld\n", cpu); + return; + } + + /* If a CPU failed to round up we could be here */ + kdb_tsk = KDB_TSK(cpu); + if (!kdb_tsk) { + kdb_printf("WARNING: no task for cpu %ld\n", cpu); + return; + } + + kdb_set_current_task(kdb_tsk); + kdb_bt1(kdb_tsk, ~0UL, false); +} + int kdb_bt(int argc, const char **argv) { @@ -161,7 +182,6 @@ kdb_bt(int argc, const char **argv) } else if (strcmp(argv[0], "btc") == 0) { unsigned long cpu = ~0; struct task_struct *save_current_task = kdb_current_task; - char buf[80]; if (argc > 1) return KDB_ARGCOUNT; if (argc == 1) { @@ -169,35 +189,22 @@ kdb_bt(int argc, const char **argv) if (diag) return diag; } - /* Recursive use of kdb_parse, do not use argv after - * this point */ - argv = NULL; if (cpu != ~0) { - if (cpu >= num_possible_cpus() || !cpu_online(cpu)) { - kdb_printf("no process for cpu %ld\n", cpu); - return 0; - } - sprintf(buf, "btt 0x%px\n", KDB_TSK(cpu)); - kdb_parse(buf); - return 0; - } - kdb_printf("btc: cpu status: "); - kdb_parse("cpu\n"); - for_each_online_cpu(cpu) { - void *kdb_tsk = KDB_TSK(cpu); - - /* If a CPU failed to round up we could be here */ - if (!kdb_tsk) { - kdb_printf("WARNING: no task for cpu %ld\n", - cpu); - continue; + kdb_bt_cpu(cpu); + } else { + /* + * Recursive use of kdb_parse, do not use argv after + * this point. + */ + argv = NULL; + kdb_printf("btc: cpu status: "); + kdb_parse("cpu\n"); + for_each_online_cpu(cpu) { + kdb_bt_cpu(cpu); + touch_nmi_watchdog(); } - - sprintf(buf, "btt 0x%px\n", kdb_tsk); - kdb_parse(buf); - touch_nmi_watchdog(); + kdb_set_current_task(save_current_task); } - kdb_set_current_task(save_current_task); return 0; } else { if (argc) { |